YoElla

YoElla is the most common name used to describe relationship of Yozora Yoko and Tachibana Elisabeth.

Summary
Yoko and Ella met for the first time during the 155th Generation Draft. Yoko immediately showed interest in Ella due to her elegant clothes and what she called "doll-like appearance". Ella was initially overwhelemed by Yoko's big interest in her and was uncertain about her opinion of younger girl as well as the nickname Ellie-chan that she gave her. However after spending more time with her she started to become more comfortable around her and they eventually became very good friends.

Their relationship had big affect on both of their personalities. Yoko helped Ella become more open and helped her be more free in showing her excited and curious personality while Ella calms Yoko down when her excitement goes too far (although she isn't always successful).

In a way both of them took the role of younger and older sister, depending on the situation.

Trivia

 * Yoko and Ella participated in Unit Taikai as Hime Caramel.